1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok@emcraft.com>
4 * (C) Copyright 2008,2009 Eric Jarrige <eric.jarrige@armadeus.org>
5 * (C) Copyright 2008 Armadeus Systems nc
6 * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
7 * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert@pengutronix.de>
20 #include <asm/cache.h>
21 #include <asm/global_data.h>
22 #include <linux/delay.h>
23 #include <power/regulator.h>
26 #include <linux/errno.h>
27 #include <linux/compiler.h>
29 #include <asm/arch/clock.h>
30 #include <asm/arch/imx-regs.h>
31 #include <asm/mach-imx/sys_proto.h>
32 #include <asm-generic/gpio.h>
37 DECLARE_GLOBAL_DATA_PTR;
40 * Timeout the transfer after 5 mS. This is usually a bit more, since
41 * the code in the tightloops this timeout is used in adds some overhead.
43 #define FEC_XFER_TIMEOUT 5000
46 * The standard 32-byte DMA alignment does not work on mx6solox, which requires
47 * 64-byte alignment in the DMA RX FEC buffer.
48 * Introduce the FEC_DMA_RX_MINALIGN which can cover mx6solox needs and also
49 * satisfies the alignment on other SoCs (32-bytes)
51 #define FEC_DMA_RX_MINALIGN 64
54 #error "CONFIG_MII has to be defined!"
57 #ifndef CONFIG_FEC_XCV_TYPE
58 #define CONFIG_FEC_XCV_TYPE MII100
62 * The i.MX28 operates with packets in big endian. We need to swap them before
63 * sending and after receiving.
66 #define CONFIG_FEC_MXC_SWAP_PACKET
69 #define RXDESC_PER_CACHELINE (ARCH_DMA_MINALIGN/sizeof(struct fec_bd))
71 /* Check various alignment issues at compile time */
72 #if ((ARCH_DMA_MINALIGN < 16) || (ARCH_DMA_MINALIGN % 16 != 0))
73 #error "ARCH_DMA_MINALIGN must be multiple of 16!"
76 #if ((PKTALIGN < ARCH_DMA_MINALIGN) || \
77 (PKTALIGN % ARCH_DMA_MINALIGN != 0))
78 #error "PKTALIGN must be multiple of ARCH_DMA_MINALIGN!"
83 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
84 static void swap_packet(uint32_t *packet, int length)
88 for (i = 0; i < DIV_ROUND_UP(length, 4); i++)
89 packet[i] = __swab32(packet[i]);
93 /* MII-interface related functions */
94 static int fec_mdio_read(struct ethernet_regs *eth, uint8_t phyaddr,
97 uint32_t reg; /* convenient holder for the PHY register */
98 uint32_t phy; /* convenient holder for the PHY */
103 * reading from any PHY's register is done by properly
104 * programming the FEC's MII data register.
106 writel(FEC_IEVENT_MII, ð->ievent);
107 reg = regaddr << FEC_MII_DATA_RA_SHIFT;
108 phy = phyaddr << FEC_MII_DATA_PA_SHIFT;
110 writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA |
111 phy | reg, ð->mii_data);
113 /* wait for the related interrupt */
114 start = get_timer(0);
115 while (!(readl(ð->ievent) & FEC_IEVENT_MII)) {
116 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
117 printf("Read MDIO failed...\n");
122 /* clear mii interrupt bit */
123 writel(FEC_IEVENT_MII, ð->ievent);
125 /* it's now safe to read the PHY's register */
126 val = (unsigned short)readl(ð->mii_data);
127 debug("%s: phy: %02x reg:%02x val:%#x\n", __func__, phyaddr,
132 #ifndef imx_get_fecclk
133 u32 __weak imx_get_fecclk(void)
139 static int fec_get_clk_rate(void *udev, int idx)
141 struct fec_priv *fec;
145 if (IS_ENABLED(CONFIG_IMX8) ||
146 CONFIG_IS_ENABLED(CLK_CCF)) {
149 ret = uclass_get_device_by_seq(UCLASS_ETH, idx, &dev);
151 debug("Can't get FEC udev: %d\n", ret);
156 fec = dev_get_priv(dev);
158 return fec->clk_rate;
162 return imx_get_fecclk();
166 static void fec_mii_setspeed(struct ethernet_regs *eth)
169 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
170 * and do not drop the Preamble.
172 * The i.MX28 and i.MX6 types have another field in the MSCR (aka
173 * MII_SPEED) register that defines the MDIO output hold time. Earlier
174 * versions are RAZ there, so just ignore the difference and write the
176 * The minimal hold time according to IEE802.3 (clause 22) is 10 ns.
177 * HOLDTIME + 1 is the number of clk cycles the fec is holding the
179 * The HOLDTIME bitfield takes values between 0 and 7 (inclusive).
180 * Given that ceil(clkrate / 5000000) <= 64, the calculation for
181 * holdtime cannot result in a value greater than 3.
188 ret = fec_get_clk_rate(NULL, 0);
190 printf("Can't find FEC0 clk rate: %d\n", ret);
194 speed = DIV_ROUND_UP(pclk, 5000000);
195 hold = DIV_ROUND_UP(pclk, 100000000) - 1;
197 #ifdef FEC_QUIRK_ENET_MAC
200 writel(speed << 1 | hold << 8, ð->mii_speed);
201 debug("%s: mii_speed %08x\n", __func__, readl(ð->mii_speed));
204 static int fec_mdio_write(struct ethernet_regs *eth, uint8_t phyaddr,
205 uint8_t regaddr, uint16_t data)
207 uint32_t reg; /* convenient holder for the PHY register */
208 uint32_t phy; /* convenient holder for the PHY */
211 reg = regaddr << FEC_MII_DATA_RA_SHIFT;
212 phy = phyaddr << FEC_MII_DATA_PA_SHIFT;
214 writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
215 FEC_MII_DATA_TA | phy | reg | data, ð->mii_data);
217 /* wait for the MII interrupt */
218 start = get_timer(0);
219 while (!(readl(ð->ievent) & FEC_IEVENT_MII)) {
220 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
221 printf("Write MDIO failed...\n");
226 /* clear MII interrupt bit */
227 writel(FEC_IEVENT_MII, ð->ievent);
228 debug("%s: phy: %02x reg:%02x val:%#x\n", __func__, phyaddr,
234 static int fec_phy_read(struct mii_dev *bus, int phyaddr, int dev_addr,
237 return fec_mdio_read(bus->priv, phyaddr, regaddr);
240 static int fec_phy_write(struct mii_dev *bus, int phyaddr, int dev_addr,
241 int regaddr, u16 data)
243 return fec_mdio_write(bus->priv, phyaddr, regaddr, data);
246 #ifndef CONFIG_PHYLIB
247 static int miiphy_restart_aneg(struct eth_device *dev)
250 #if !defined(CONFIG_FEC_MXC_NO_ANEG)
251 struct fec_priv *fec = (struct fec_priv *)dev->priv;
252 struct ethernet_regs *eth = fec->bus->priv;
255 * Wake up from sleep if necessary
256 * Reset PHY, then delay 300ns
259 fec_mdio_write(eth, fec->phy_id, MII_DCOUNTER, 0x00FF);
261 fec_mdio_write(eth, fec->phy_id, MII_BMCR, BMCR_RESET);
264 /* Set the auto-negotiation advertisement register bits */
265 fec_mdio_write(eth, fec->phy_id, MII_ADVERTISE,
266 LPA_100FULL | LPA_100HALF | LPA_10FULL |
267 LPA_10HALF | PHY_ANLPAR_PSB_802_3);
268 fec_mdio_write(eth, fec->phy_id, MII_BMCR,
269 BMCR_ANENABLE | BMCR_ANRESTART);
271 if (fec->mii_postcall)
272 ret = fec->mii_postcall(fec->phy_id);
278 #ifndef CONFIG_FEC_FIXED_SPEED
279 static int miiphy_wait_aneg(struct eth_device *dev)
283 struct fec_priv *fec = (struct fec_priv *)dev->priv;
284 struct ethernet_regs *eth = fec->bus->priv;
286 /* Wait for AN completion */
287 start = get_timer(0);
289 if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
290 printf("%s: Autonegotiation timeout\n", dev->name);
294 status = fec_mdio_read(eth, fec->phy_id, MII_BMSR);
296 printf("%s: Autonegotiation failed. status: %d\n",
300 } while (!(status & BMSR_LSTATUS));
304 #endif /* CONFIG_FEC_FIXED_SPEED */
307 static int fec_rx_task_enable(struct fec_priv *fec)
309 writel(FEC_R_DES_ACTIVE_RDAR, &fec->eth->r_des_active);
313 static int fec_rx_task_disable(struct fec_priv *fec)
318 static int fec_tx_task_enable(struct fec_priv *fec)
320 writel(FEC_X_DES_ACTIVE_TDAR, &fec->eth->x_des_active);
324 static int fec_tx_task_disable(struct fec_priv *fec)
330 * Initialize receive task's buffer descriptors
331 * @param[in] fec all we know about the device yet
332 * @param[in] count receive buffer count to be allocated
333 * @param[in] dsize desired size of each receive buffer
334 * @return 0 on success
336 * Init all RX descriptors to default values.
338 static void fec_rbd_init(struct fec_priv *fec, int count, int dsize)
345 * Reload the RX descriptors with default values and wipe
348 size = roundup(dsize, ARCH_DMA_MINALIGN);
349 for (i = 0; i < count; i++) {
350 data = fec->rbd_base[i].data_pointer;
351 memset((void *)data, 0, dsize);
352 flush_dcache_range(data, data + size);
354 fec->rbd_base[i].status = FEC_RBD_EMPTY;
355 fec->rbd_base[i].data_length = 0;
358 /* Mark the last RBD to close the ring. */
359 fec->rbd_base[i - 1].status = FEC_RBD_WRAP | FEC_RBD_EMPTY;
362 flush_dcache_range((ulong)fec->rbd_base,
363 (ulong)fec->rbd_base + size);
367 * Initialize transmit task's buffer descriptors
368 * @param[in] fec all we know about the device yet
370 * Transmit buffers are created externally. We only have to init the BDs here.\n
371 * Note: There is a race condition in the hardware. When only one BD is in
372 * use it must be marked with the WRAP bit to use it for every transmitt.
373 * This bit in combination with the READY bit results into double transmit
374 * of each data buffer. It seems the state machine checks READY earlier then
375 * resetting it after the first transfer.
376 * Using two BDs solves this issue.
378 static void fec_tbd_init(struct fec_priv *fec)
380 ulong addr = (ulong)fec->tbd_base;
381 unsigned size = roundup(2 * sizeof(struct fec_bd),
384 memset(fec->tbd_base, 0, size);
385 fec->tbd_base[0].status = 0;
386 fec->tbd_base[1].status = FEC_TBD_WRAP;
388 flush_dcache_range(addr, addr + size);
392 * Mark the given read buffer descriptor as free
393 * @param[in] last 1 if this is the last buffer descriptor in the chain, else 0
394 * @param[in] prbd buffer descriptor to mark free again
396 static void fec_rbd_clean(int last, struct fec_bd *prbd)
398 unsigned short flags = FEC_RBD_EMPTY;
400 flags |= FEC_RBD_WRAP;
401 writew(flags, &prbd->status);
402 writew(0, &prbd->data_length);
405 static int fec_get_hwaddr(int dev_id, unsigned char *mac)
407 imx_get_mac_from_fuse(dev_id, mac);
408 return !is_valid_ethaddr(mac);
412 static int fecmxc_set_hwaddr(struct udevice *dev)
414 static int fec_set_hwaddr(struct eth_device *dev)
418 struct fec_priv *fec = dev_get_priv(dev);
419 struct eth_pdata *pdata = dev_get_plat(dev);
420 uchar *mac = pdata->enetaddr;
422 uchar *mac = dev->enetaddr;
423 struct fec_priv *fec = (struct fec_priv *)dev->priv;
426 writel(0, &fec->eth->iaddr1);
427 writel(0, &fec->eth->iaddr2);
428 writel(0, &fec->eth->gaddr1);
429 writel(0, &fec->eth->gaddr2);
431 /* Set physical address */
432 writel((mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3],
434 writel((mac[4] << 24) + (mac[5] << 16) + 0x8808, &fec->eth->paddr2);
439 /* Do initial configuration of the FEC registers */
440 static void fec_reg_setup(struct fec_priv *fec)
444 /* Set interrupt mask register */
445 writel(0x00000000, &fec->eth->imask);
447 /* Clear FEC-Lite interrupt event register(IEVENT) */
448 writel(0xffffffff, &fec->eth->ievent);
450 /* Set FEC-Lite receive control register(R_CNTRL): */
452 /* Start with frame length = 1518, common for all modes. */
453 rcntrl = PKTSIZE << FEC_RCNTRL_MAX_FL_SHIFT;
454 if (fec->xcv_type != SEVENWIRE) /* xMII modes */
455 rcntrl |= FEC_RCNTRL_FCE | FEC_RCNTRL_MII_MODE;
456 if (fec->xcv_type == RGMII)
457 rcntrl |= FEC_RCNTRL_RGMII;
458 else if (fec->xcv_type == RMII)
459 rcntrl |= FEC_RCNTRL_RMII;
461 writel(rcntrl, &fec->eth->r_cntrl);
465 * Start the FEC engine
466 * @param[in] dev Our device to handle
469 static int fec_open(struct udevice *dev)
471 static int fec_open(struct eth_device *edev)
475 struct fec_priv *fec = dev_get_priv(dev);
477 struct fec_priv *fec = (struct fec_priv *)edev->priv;
483 debug("fec_open: fec_open(dev)\n");
484 /* full-duplex, heartbeat disabled */
485 writel(1 << 2, &fec->eth->x_cntrl);
488 /* Invalidate all descriptors */
489 for (i = 0; i < FEC_RBD_NUM - 1; i++)
490 fec_rbd_clean(0, &fec->rbd_base[i]);
491 fec_rbd_clean(1, &fec->rbd_base[i]);
493 /* Flush the descriptors into RAM */
494 size = roundup(FEC_RBD_NUM * sizeof(struct fec_bd),
496 addr = (ulong)fec->rbd_base;
497 flush_dcache_range(addr, addr + size);
499 #ifdef FEC_QUIRK_ENET_MAC
500 /* Enable ENET HW endian SWAP */
501 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_DBSWAP,
503 /* Enable ENET store and forward mode */
504 writel(readl(&fec->eth->x_wmrk) | FEC_X_WMRK_STRFWD,
507 /* Enable FEC-Lite controller */
508 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_ETHER_EN,
511 #ifdef FEC_ENET_ENABLE_TXC_DELAY
512 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_TXC_DLY,
516 #ifdef FEC_ENET_ENABLE_RXC_DELAY
517 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_RXC_DLY,
521 #if defined(CONFIG_MX25) || defined(CONFIG_MX53) || defined(CONFIG_MX6SL)
524 /* setup the MII gasket for RMII mode */
525 /* disable the gasket */
526 writew(0, &fec->eth->miigsk_enr);
528 /* wait for the gasket to be disabled */
529 while (readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY)
532 /* configure gasket for RMII, 50 MHz, no loopback, and no echo */
533 writew(MIIGSK_CFGR_IF_MODE_RMII, &fec->eth->miigsk_cfgr);
535 /* re-enable the gasket */
536 writew(MIIGSK_ENR_EN, &fec->eth->miigsk_enr);
538 /* wait until MII gasket is ready */
540 while ((readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY) == 0) {
541 if (--max_loops <= 0) {
542 printf("WAIT for MII Gasket ready timed out\n");
550 /* Start up the PHY */
551 int ret = phy_startup(fec->phydev);
554 printf("Could not initialize PHY %s\n",
555 fec->phydev->dev->name);
558 speed = fec->phydev->speed;
560 #elif CONFIG_FEC_FIXED_SPEED
561 speed = CONFIG_FEC_FIXED_SPEED;
563 miiphy_wait_aneg(edev);
564 speed = miiphy_speed(edev->name, fec->phy_id);
565 miiphy_duplex(edev->name, fec->phy_id);
568 #ifdef FEC_QUIRK_ENET_MAC
570 u32 ecr = readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_SPEED;
571 u32 rcr = readl(&fec->eth->r_cntrl) & ~FEC_RCNTRL_RMII_10T;
572 if (speed == _1000BASET)
573 ecr |= FEC_ECNTRL_SPEED;
574 else if (speed != _100BASET)
575 rcr |= FEC_RCNTRL_RMII_10T;
576 writel(ecr, &fec->eth->ecntrl);
577 writel(rcr, &fec->eth->r_cntrl);
580 debug("%s:Speed=%i\n", __func__, speed);
582 /* Enable SmartDMA receive task */
583 fec_rx_task_enable(fec);
590 static int fecmxc_init(struct udevice *dev)
592 static int fec_init(struct eth_device *dev, struct bd_info *bd)
596 struct fec_priv *fec = dev_get_priv(dev);
598 struct fec_priv *fec = (struct fec_priv *)dev->priv;
600 u8 *mib_ptr = (uint8_t *)&fec->eth->rmon_t_drop;
604 /* Initialize MAC address */
606 fecmxc_set_hwaddr(dev);
611 /* Setup transmit descriptors, there are two in total. */
614 /* Setup receive descriptors. */
615 fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE);
619 if (fec->xcv_type != SEVENWIRE)
620 fec_mii_setspeed(fec->bus->priv);
622 /* Set Opcode/Pause Duration Register */
623 writel(0x00010020, &fec->eth->op_pause); /* FIXME 0xffff0020; */
624 writel(0x2, &fec->eth->x_wmrk);
626 /* Set multicast address filter */
627 writel(0x00000000, &fec->eth->gaddr1);
628 writel(0x00000000, &fec->eth->gaddr2);
630 /* Do not access reserved register */
631 if (!is_mx6ul() && !is_mx6ull() && !is_imx8() && !is_imx8m()) {
633 for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4)
636 /* FIFO receive start register */
637 writel(0x520, &fec->eth->r_fstart);
640 /* size and address of each buffer */
641 writel(FEC_MAX_PKT_SIZE, &fec->eth->emrbr);
643 addr = (ulong)fec->tbd_base;
644 writel((uint32_t)addr, &fec->eth->etdsr);
646 addr = (ulong)fec->rbd_base;
647 writel((uint32_t)addr, &fec->eth->erdsr);
649 #ifndef CONFIG_PHYLIB
650 if (fec->xcv_type != SEVENWIRE)
651 miiphy_restart_aneg(dev);
658 * Halt the FEC engine
659 * @param[in] dev Our device to handle
662 static void fecmxc_halt(struct udevice *dev)
664 static void fec_halt(struct eth_device *dev)
668 struct fec_priv *fec = dev_get_priv(dev);
670 struct fec_priv *fec = (struct fec_priv *)dev->priv;
672 int counter = 0xffff;
674 /* issue graceful stop command to the FEC transmitter if necessary */
675 writel(FEC_TCNTRL_GTS | readl(&fec->eth->x_cntrl),
678 debug("eth_halt: wait for stop regs\n");
679 /* wait for graceful stop to register */
680 while ((counter--) && (!(readl(&fec->eth->ievent) & FEC_IEVENT_GRA)))
683 /* Disable SmartDMA tasks */
684 fec_tx_task_disable(fec);
685 fec_rx_task_disable(fec);
688 * Disable the Ethernet Controller
689 * Note: this will also reset the BD index counter!
691 writel(readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_ETHER_EN,
695 debug("eth_halt: done\n");
700 * @param[in] dev Our ethernet device to handle
701 * @param[in] packet Pointer to the data to be transmitted
702 * @param[in] length Data count in bytes
703 * @return 0 on success
706 static int fecmxc_send(struct udevice *dev, void *packet, int length)
708 static int fec_send(struct eth_device *dev, void *packet, int length)
714 int timeout = FEC_XFER_TIMEOUT;
718 * This routine transmits one frame. This routine only accepts
719 * 6-byte Ethernet addresses.
722 struct fec_priv *fec = dev_get_priv(dev);
724 struct fec_priv *fec = (struct fec_priv *)dev->priv;
728 * Check for valid length of data.
730 if ((length > 1500) || (length <= 0)) {
731 printf("Payload (%d) too large\n", length);
736 * Setup the transmit buffer. We are always using the first buffer for
737 * transmission, the second will be empty and only used to stop the DMA
738 * engine. We also flush the packet to RAM here to avoid cache trouble.
740 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
741 swap_packet((uint32_t *)packet, length);
744 addr = (ulong)packet;
745 end = roundup(addr + length, ARCH_DMA_MINALIGN);
746 addr &= ~(ARCH_DMA_MINALIGN - 1);
747 flush_dcache_range(addr, end);
749 writew(length, &fec->tbd_base[fec->tbd_index].data_length);
750 writel((uint32_t)addr, &fec->tbd_base[fec->tbd_index].data_pointer);
753 * update BD's status now
755 * - is always the last in a chain (means no chain)
756 * - should transmitt the CRC
757 * - might be the last BD in the list, so the address counter should
758 * wrap (-> keep the WRAP flag)
760 status = readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_WRAP;
761 status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
762 writew(status, &fec->tbd_base[fec->tbd_index].status);
765 * Flush data cache. This code flushes both TX descriptors to RAM.
766 * After this code, the descriptors will be safely in RAM and we
769 size = roundup(2 * sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
770 addr = (ulong)fec->tbd_base;
771 flush_dcache_range(addr, addr + size);
774 * Below we read the DMA descriptor's last four bytes back from the
775 * DRAM. This is important in order to make sure that all WRITE
776 * operations on the bus that were triggered by previous cache FLUSH
779 * Otherwise, on MX28, it is possible to observe a corruption of the
780 * DMA descriptors. Please refer to schematic "Figure 1-2" in MX28RM
781 * for the bus structure of MX28. The scenario is as follows:
783 * 1) ARM core triggers a series of WRITEs on the AHB_ARB2 bus going
784 * to DRAM due to flush_dcache_range()
785 * 2) ARM core writes the FEC registers via AHB_ARB2
786 * 3) FEC DMA starts reading/writing from/to DRAM via AHB_ARB3
788 * Note that 2) does sometimes finish before 1) due to reordering of
789 * WRITE accesses on the AHB bus, therefore triggering 3) before the
790 * DMA descriptor is fully written into DRAM. This results in occasional
791 * corruption of the DMA descriptor.
793 readl(addr + size - 4);
795 /* Enable SmartDMA transmit task */
796 fec_tx_task_enable(fec);
799 * Wait until frame is sent. On each turn of the wait cycle, we must
800 * invalidate data cache to see what's really in RAM. Also, we need
804 if (!(readl(&fec->eth->x_des_active) & FEC_X_DES_ACTIVE_TDAR))
814 * The TDAR bit is cleared when the descriptors are all out from TX
815 * but on mx6solox we noticed that the READY bit is still not cleared
817 * These are two distinct signals, and in IC simulation, we found that
818 * TDAR always gets cleared prior than the READY bit of last BD becomes
820 * In mx6solox, we use a later version of FEC IP. It looks like that
821 * this intrinsic behaviour of TDAR bit has changed in this newer FEC
824 * Fix this by polling the READY bit of BD after the TDAR polling,
825 * which covers the mx6solox case and does not harm the other SoCs.
827 timeout = FEC_XFER_TIMEOUT;
829 invalidate_dcache_range(addr, addr + size);
830 if (!(readw(&fec->tbd_base[fec->tbd_index].status) &
839 debug("fec_send: status 0x%x index %d ret %i\n",
840 readw(&fec->tbd_base[fec->tbd_index].status),
841 fec->tbd_index, ret);
842 /* for next transmission use the other buffer */
852 * Pull one frame from the card
853 * @param[in] dev Our ethernet device to handle
854 * @return Length of packet read
857 static int fecmxc_recv(struct udevice *dev, int flags, uchar **packetp)
859 static int fec_recv(struct eth_device *dev)
863 struct fec_priv *fec = dev_get_priv(dev);
865 struct fec_priv *fec = (struct fec_priv *)dev->priv;
867 struct fec_bd *rbd = &fec->rbd_base[fec->rbd_index];
868 unsigned long ievent;
869 int frame_length, len = 0;
871 ulong addr, size, end;
875 *packetp = memalign(ARCH_DMA_MINALIGN, FEC_MAX_PKT_SIZE);
877 printf("%s: error allocating packetp\n", __func__);
881 ALLOC_CACHE_ALIGN_BUFFER(uchar, buff, FEC_MAX_PKT_SIZE);
884 /* Check if any critical events have happened */
885 ievent = readl(&fec->eth->ievent);
886 writel(ievent, &fec->eth->ievent);
887 debug("fec_recv: ievent 0x%lx\n", ievent);
888 if (ievent & FEC_IEVENT_BABR) {
894 fec_init(dev, fec->bd);
896 printf("some error: 0x%08lx\n", ievent);
899 if (ievent & FEC_IEVENT_HBERR) {
900 /* Heartbeat error */
901 writel(0x00000001 | readl(&fec->eth->x_cntrl),
904 if (ievent & FEC_IEVENT_GRA) {
905 /* Graceful stop complete */
906 if (readl(&fec->eth->x_cntrl) & 0x00000001) {
912 writel(~0x00000001 & readl(&fec->eth->x_cntrl),
917 fec_init(dev, fec->bd);
923 * Read the buffer status. Before the status can be read, the data cache
924 * must be invalidated, because the data in RAM might have been changed
925 * by DMA. The descriptors are properly aligned to cachelines so there's
926 * no need to worry they'd overlap.
928 * WARNING: By invalidating the descriptor here, we also invalidate
929 * the descriptors surrounding this one. Therefore we can NOT change the
930 * contents of this descriptor nor the surrounding ones. The problem is
931 * that in order to mark the descriptor as processed, we need to change
932 * the descriptor. The solution is to mark the whole cache line when all
933 * descriptors in the cache line are processed.
936 addr &= ~(ARCH_DMA_MINALIGN - 1);
937 size = roundup(sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
938 invalidate_dcache_range(addr, addr + size);
940 bd_status = readw(&rbd->status);
941 debug("fec_recv: status 0x%x\n", bd_status);
943 if (!(bd_status & FEC_RBD_EMPTY)) {
944 if ((bd_status & FEC_RBD_LAST) && !(bd_status & FEC_RBD_ERR) &&
945 ((readw(&rbd->data_length) - 4) > 14)) {
946 /* Get buffer address and size */
947 addr = readl(&rbd->data_pointer);
948 frame_length = readw(&rbd->data_length) - 4;
949 /* Invalidate data cache over the buffer */
950 end = roundup(addr + frame_length, ARCH_DMA_MINALIGN);
951 addr &= ~(ARCH_DMA_MINALIGN - 1);
952 invalidate_dcache_range(addr, end);
954 /* Fill the buffer and pass it to upper layers */
955 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
956 swap_packet((uint32_t *)addr, frame_length);
960 memcpy(*packetp, (char *)addr, frame_length);
962 memcpy(buff, (char *)addr, frame_length);
963 net_process_received_packet(buff, frame_length);
967 if (bd_status & FEC_RBD_ERR)
968 debug("error frame: 0x%08lx 0x%08x\n",
973 * Free the current buffer, restart the engine and move forward
974 * to the next buffer. Here we check if the whole cacheline of
975 * descriptors was already processed and if so, we mark it free
978 size = RXDESC_PER_CACHELINE - 1;
979 if ((fec->rbd_index & size) == size) {
980 i = fec->rbd_index - size;
981 addr = (ulong)&fec->rbd_base[i];
982 for (; i <= fec->rbd_index ; i++) {
983 fec_rbd_clean(i == (FEC_RBD_NUM - 1),
986 flush_dcache_range(addr,
987 addr + ARCH_DMA_MINALIGN);
990 fec_rx_task_enable(fec);
991 fec->rbd_index = (fec->rbd_index + 1) % FEC_RBD_NUM;
993 debug("fec_recv: stop\n");
998 static void fec_set_dev_name(char *dest, int dev_id)
1000 sprintf(dest, (dev_id == -1) ? "FEC" : "FEC%i", dev_id);
1003 static int fec_alloc_descs(struct fec_priv *fec)
1010 /* Allocate TX descriptors. */
1011 size = roundup(2 * sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
1012 fec->tbd_base = memalign(ARCH_DMA_MINALIGN, size);
1016 /* Allocate RX descriptors. */
1017 size = roundup(FEC_RBD_NUM * sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
1018 fec->rbd_base = memalign(ARCH_DMA_MINALIGN, size);
1022 memset(fec->rbd_base, 0, size);
1024 /* Allocate RX buffers. */
1026 /* Maximum RX buffer size. */
1027 size = roundup(FEC_MAX_PKT_SIZE, FEC_DMA_RX_MINALIGN);
1028 for (i = 0; i < FEC_RBD_NUM; i++) {
1029 data = memalign(FEC_DMA_RX_MINALIGN, size);
1031 printf("%s: error allocating rxbuf %d\n", __func__, i);
1035 memset(data, 0, size);
1038 fec->rbd_base[i].data_pointer = (uint32_t)addr;
1039 fec->rbd_base[i].status = FEC_RBD_EMPTY;
1040 fec->rbd_base[i].data_length = 0;
1041 /* Flush the buffer to memory. */
1042 flush_dcache_range(addr, addr + size);
1045 /* Mark the last RBD to close the ring. */
1046 fec->rbd_base[i - 1].status = FEC_RBD_WRAP | FEC_RBD_EMPTY;
1054 for (; i >= 0; i--) {
1055 addr = fec->rbd_base[i].data_pointer;
1058 free(fec->rbd_base);
1060 free(fec->tbd_base);
1065 static void fec_free_descs(struct fec_priv *fec)
1070 for (i = 0; i < FEC_RBD_NUM; i++) {
1071 addr = fec->rbd_base[i].data_pointer;
1074 free(fec->rbd_base);
1075 free(fec->tbd_base);
1078 struct mii_dev *fec_get_miibus(ulong base_addr, int dev_id)
1080 struct ethernet_regs *eth = (struct ethernet_regs *)base_addr;
1081 struct mii_dev *bus;
1086 printf("mdio_alloc failed\n");
1089 bus->read = fec_phy_read;
1090 bus->write = fec_phy_write;
1092 fec_set_dev_name(bus->name, dev_id);
1094 ret = mdio_register(bus);
1096 printf("mdio_register failed\n");
1100 fec_mii_setspeed(eth);
1104 #ifndef CONFIG_DM_ETH
1105 #ifdef CONFIG_PHYLIB
1106 int fec_probe(struct bd_info *bd, int dev_id, uint32_t base_addr,
1107 struct mii_dev *bus, struct phy_device *phydev)
1109 static int fec_probe(struct bd_info *bd, int dev_id, uint32_t base_addr,
1110 struct mii_dev *bus, int phy_id)
1113 struct eth_device *edev;
1114 struct fec_priv *fec;
1115 unsigned char ethaddr[6];
1120 /* create and fill edev struct */
1121 edev = (struct eth_device *)malloc(sizeof(struct eth_device));
1123 puts("fec_mxc: not enough malloc memory for eth_device\n");
1128 fec = (struct fec_priv *)malloc(sizeof(struct fec_priv));
1130 puts("fec_mxc: not enough malloc memory for fec_priv\n");
1135 memset(edev, 0, sizeof(*edev));
1136 memset(fec, 0, sizeof(*fec));
1138 ret = fec_alloc_descs(fec);
1143 edev->init = fec_init;
1144 edev->send = fec_send;
1145 edev->recv = fec_recv;
1146 edev->halt = fec_halt;
1147 edev->write_hwaddr = fec_set_hwaddr;
1149 fec->eth = (struct ethernet_regs *)(ulong)base_addr;
1152 fec->xcv_type = CONFIG_FEC_XCV_TYPE;
1155 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_RESET, &fec->eth->ecntrl);
1156 start = get_timer(0);
1157 while (readl(&fec->eth->ecntrl) & FEC_ECNTRL_RESET) {
1158 if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
1159 printf("FEC MXC: Timeout resetting chip\n");
1166 fec_set_dev_name(edev->name, dev_id);
1167 fec->dev_id = (dev_id == -1) ? 0 : dev_id;
1169 fec_mii_setspeed(bus->priv);
1170 #ifdef CONFIG_PHYLIB
1171 fec->phydev = phydev;
1172 phy_connect_dev(phydev, edev);
1176 fec->phy_id = phy_id;
1179 /* only support one eth device, the index number pointed by dev_id */
1180 edev->index = fec->dev_id;
1182 if (fec_get_hwaddr(fec->dev_id, ethaddr) == 0) {
1183 debug("got MAC%d address from fuse: %pM\n", fec->dev_id, ethaddr);
1184 memcpy(edev->enetaddr, ethaddr, 6);
1186 sprintf(mac, "eth%daddr", fec->dev_id);
1188 strcpy(mac, "ethaddr");
1190 eth_env_set_enetaddr(mac, ethaddr);
1194 fec_free_descs(fec);
1203 int fecmxc_initialize_multi(struct bd_info *bd, int dev_id, int phy_id,
1207 struct mii_dev *bus = NULL;
1208 #ifdef CONFIG_PHYLIB
1209 struct phy_device *phydev = NULL;
1213 if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
1214 if (enet_fused((ulong)addr)) {
1215 printf("SoC fuse indicates Ethernet@0x%x is unavailable.\n", addr);
1220 #ifdef CONFIG_FEC_MXC_MDIO_BASE
1222 * The i.MX28 has two ethernet interfaces, but they are not equal.
1223 * Only the first one can access the MDIO bus.
1225 base_mii = CONFIG_FEC_MXC_MDIO_BASE;
1229 debug("eth_init: fec_probe(bd, %i, %i) @ %08x\n", dev_id, phy_id, addr);
1230 bus = fec_get_miibus(base_mii, dev_id);
1233 #ifdef CONFIG_PHYLIB
1234 phydev = phy_find_by_mask(bus, 1 << phy_id, PHY_INTERFACE_MODE_RGMII);
1236 mdio_unregister(bus);
1240 ret = fec_probe(bd, dev_id, addr, bus, phydev);
1242 ret = fec_probe(bd, dev_id, addr, bus, phy_id);
1245 #ifdef CONFIG_PHYLIB
1248 mdio_unregister(bus);
1254 #ifdef CONFIG_FEC_MXC_PHYADDR
1255 int fecmxc_initialize(struct bd_info *bd)
1257 return fecmxc_initialize_multi(bd, -1, CONFIG_FEC_MXC_PHYADDR,
1262 #ifndef CONFIG_PHYLIB
1263 int fecmxc_register_mii_postcall(struct eth_device *dev, int (*cb)(int))
1265 struct fec_priv *fec = (struct fec_priv *)dev->priv;
1266 fec->mii_postcall = cb;
1273 static int fecmxc_read_rom_hwaddr(struct udevice *dev)
1275 struct fec_priv *priv = dev_get_priv(dev);
1276 struct eth_pdata *pdata = dev_get_plat(dev);
1278 return fec_get_hwaddr(priv->dev_id, pdata->enetaddr);
1281 static int fecmxc_free_pkt(struct udevice *dev, uchar *packet, int length)
1289 static const struct eth_ops fecmxc_ops = {
1290 .start = fecmxc_init,
1291 .send = fecmxc_send,
1292 .recv = fecmxc_recv,
1293 .free_pkt = fecmxc_free_pkt,
1294 .stop = fecmxc_halt,
1295 .write_hwaddr = fecmxc_set_hwaddr,
1296 .read_rom_hwaddr = fecmxc_read_rom_hwaddr,
1299 static int device_get_phy_addr(struct fec_priv *priv, struct udevice *dev)
1301 struct ofnode_phandle_args phandle_args;
1304 ret = dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
1307 priv->phy_of_node = ofnode_find_subnode(dev_ofnode(dev),
1309 if (ofnode_valid(priv->phy_of_node))
1311 debug("Failed to find phy-handle (err = %d)\n", ret);
1315 if (!ofnode_is_available(phandle_args.node))
1318 priv->phy_of_node = phandle_args.node;
1319 reg = ofnode_read_u32_default(phandle_args.node, "reg", 0);
1324 static int fec_phy_init(struct fec_priv *priv, struct udevice *dev)
1326 struct phy_device *phydev;
1329 addr = device_get_phy_addr(priv, dev);
1330 #ifdef CONFIG_FEC_MXC_PHYADDR
1331 addr = CONFIG_FEC_MXC_PHYADDR;
1334 phydev = phy_connect(priv->bus, addr, dev, priv->interface);
1338 priv->phydev = phydev;
1339 priv->phydev->node = priv->phy_of_node;
1345 #if CONFIG_IS_ENABLED(DM_GPIO)
1346 /* FEC GPIO reset */
1347 static void fec_gpio_reset(struct fec_priv *priv)
1349 debug("fec_gpio_reset: fec_gpio_reset(dev)\n");
1350 if (dm_gpio_is_valid(&priv->phy_reset_gpio)) {
1351 dm_gpio_set_value(&priv->phy_reset_gpio, 1);
1352 mdelay(priv->reset_delay);
1353 dm_gpio_set_value(&priv->phy_reset_gpio, 0);
1354 if (priv->reset_post_delay)
1355 mdelay(priv->reset_post_delay);
1360 static int fecmxc_probe(struct udevice *dev)
1362 bool dm_mii_bus = true;
1363 struct eth_pdata *pdata = dev_get_plat(dev);
1364 struct fec_priv *priv = dev_get_priv(dev);
1365 struct mii_dev *bus = NULL;
1369 if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
1370 if (enet_fused((ulong)priv->eth)) {
1371 printf("SoC fuse indicates Ethernet@0x%lx is unavailable.\n", (ulong)priv->eth);
1376 if (IS_ENABLED(CONFIG_IMX8)) {
1377 ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
1379 debug("Can't get FEC ipg clk: %d\n", ret);
1382 ret = clk_enable(&priv->ipg_clk);
1384 debug("Can't enable FEC ipg clk: %d\n", ret);
1388 priv->clk_rate = clk_get_rate(&priv->ipg_clk);
1389 } else if (CONFIG_IS_ENABLED(CLK_CCF)) {
1390 ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
1392 debug("Can't get FEC ipg clk: %d\n", ret);
1395 ret = clk_enable(&priv->ipg_clk);
1399 ret = clk_get_by_name(dev, "ahb", &priv->ahb_clk);
1401 debug("Can't get FEC ahb clk: %d\n", ret);
1404 ret = clk_enable(&priv->ahb_clk);
1408 ret = clk_get_by_name(dev, "enet_out", &priv->clk_enet_out);
1410 ret = clk_enable(&priv->clk_enet_out);
1415 ret = clk_get_by_name(dev, "enet_clk_ref", &priv->clk_ref);
1417 ret = clk_enable(&priv->clk_ref);
1422 ret = clk_get_by_name(dev, "ptp", &priv->clk_ptp);
1424 ret = clk_enable(&priv->clk_ptp);
1429 priv->clk_rate = clk_get_rate(&priv->ipg_clk);
1432 ret = fec_alloc_descs(priv);
1436 #ifdef CONFIG_DM_REGULATOR
1437 if (priv->phy_supply) {
1438 ret = regulator_set_enable(priv->phy_supply, true);
1440 printf("%s: Error enabling phy supply\n", dev->name);
1446 #if CONFIG_IS_ENABLED(DM_GPIO)
1447 fec_gpio_reset(priv);
1450 writel(readl(&priv->eth->ecntrl) | FEC_ECNTRL_RESET,
1451 &priv->eth->ecntrl);
1452 start = get_timer(0);
1453 while (readl(&priv->eth->ecntrl) & FEC_ECNTRL_RESET) {
1454 if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
1455 printf("FEC MXC: Timeout reseting chip\n");
1461 fec_reg_setup(priv);
1463 priv->dev_id = dev_seq(dev);
1465 #ifdef CONFIG_DM_ETH_PHY
1466 bus = eth_phy_get_mdio_bus(dev);
1471 #ifdef CONFIG_FEC_MXC_MDIO_BASE
1472 bus = fec_get_miibus((ulong)CONFIG_FEC_MXC_MDIO_BASE,
1475 bus = fec_get_miibus((ulong)priv->eth, dev_seq(dev));
1483 #ifdef CONFIG_DM_ETH_PHY
1484 eth_phy_set_mdio_bus(dev, bus);
1488 priv->interface = pdata->phy_interface;
1489 switch (priv->interface) {
1490 case PHY_INTERFACE_MODE_MII:
1491 priv->xcv_type = MII100;
1493 case PHY_INTERFACE_MODE_RMII:
1494 priv->xcv_type = RMII;
1496 case PHY_INTERFACE_MODE_RGMII:
1497 case PHY_INTERFACE_MODE_RGMII_ID:
1498 case PHY_INTERFACE_MODE_RGMII_RXID:
1499 case PHY_INTERFACE_MODE_RGMII_TXID:
1500 priv->xcv_type = RGMII;
1503 priv->xcv_type = CONFIG_FEC_XCV_TYPE;
1504 printf("Unsupported interface type %d defaulting to %d\n",
1505 priv->interface, priv->xcv_type);
1509 ret = fec_phy_init(priv, dev);
1517 mdio_unregister(bus);
1522 fec_free_descs(priv);
1526 static int fecmxc_remove(struct udevice *dev)
1528 struct fec_priv *priv = dev_get_priv(dev);
1531 fec_free_descs(priv);
1532 mdio_unregister(priv->bus);
1533 mdio_free(priv->bus);
1535 #ifdef CONFIG_DM_REGULATOR
1536 if (priv->phy_supply)
1537 regulator_set_enable(priv->phy_supply, false);
1543 static int fecmxc_of_to_plat(struct udevice *dev)
1546 struct eth_pdata *pdata = dev_get_plat(dev);
1547 struct fec_priv *priv = dev_get_priv(dev);
1548 const char *phy_mode;
1550 pdata->iobase = dev_read_addr(dev);
1551 priv->eth = (struct ethernet_regs *)pdata->iobase;
1553 pdata->phy_interface = -1;
1554 phy_mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy-mode",
1557 pdata->phy_interface = phy_get_interface_by_name(phy_mode);
1558 if (pdata->phy_interface == -1) {
1559 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
1563 #ifdef CONFIG_DM_REGULATOR
1564 device_get_supply_regulator(dev, "phy-supply", &priv->phy_supply);
1567 #if CONFIG_IS_ENABLED(DM_GPIO)
1568 ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
1569 &priv->phy_reset_gpio, GPIOD_IS_OUT);
1571 return 0; /* property is optional, don't return error! */
1573 priv->reset_delay = dev_read_u32_default(dev, "phy-reset-duration", 1);
1574 if (priv->reset_delay > 1000) {
1575 printf("FEC MXC: phy reset duration should be <= 1000ms\n");
1576 /* property value wrong, use default value */
1577 priv->reset_delay = 1;
1580 priv->reset_post_delay = dev_read_u32_default(dev,
1581 "phy-reset-post-delay",
1583 if (priv->reset_post_delay > 1000) {
1584 printf("FEC MXC: phy reset post delay should be <= 1000ms\n");
1585 /* property value wrong, use default value */
1586 priv->reset_post_delay = 0;
1593 static const struct udevice_id fecmxc_ids[] = {
1594 { .compatible = "fsl,imx28-fec" },
1595 { .compatible = "fsl,imx6q-fec" },
1596 { .compatible = "fsl,imx6sl-fec" },
1597 { .compatible = "fsl,imx6sx-fec" },
1598 { .compatible = "fsl,imx6ul-fec" },
1599 { .compatible = "fsl,imx53-fec" },
1600 { .compatible = "fsl,imx7d-fec" },
1601 { .compatible = "fsl,mvf600-fec" },
1605 U_BOOT_DRIVER(fecmxc_gem) = {
1608 .of_match = fecmxc_ids,
1609 .of_to_plat = fecmxc_of_to_plat,
1610 .probe = fecmxc_probe,
1611 .remove = fecmxc_remove,
1613 .priv_auto = sizeof(struct fec_priv),
1614 .plat_auto = sizeof(struct eth_pdata),